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    Wyświetlanie 1-8 z 8
    Tytuł:
    Dynamic behaviour of axially functionally graded beam resting on variable elastic foundation
    Autorzy:
    Kumar, Saurabh
    Powiązania:
    https://bibliotekanauki.pl/articles/1845017.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    free vibration
    variable elastic foundation
    axially functionally graded beams
    Euler-Bernoulli beam
    Timoshenko beam
    wolne wibracje
    podłoże zmiennie sprężyste
    belka Eulera-Bernoulliego
    wiązka Tymoszenko
    Opis:
    In this paper, a comprehensive study is carried out on the dynamic behaviour of Euler–Bernoulli and Timoshenko beams resting on Winkler type variable elastic foundation. The material properties of the beam and the stiffness of the foundation are considered to be varying along the length direction. The free vibration problem is formulated using Rayleigh-Ritz method and Hamilton’s principle is applied to generate the governing equations. The results are presented as non-dimensional natural frequencies for different material gradation models and different foundation stiffness variation models. Two distinct boundary conditions viz., clamped-clamped and simply supported-simply supported are considered in the analysis. The results are validated with existing literature and excellent agreement is observed between the results.
    Źródło:
    Archive of Mechanical Engineering; 2020, LXVII, 4; 451-470
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Real time online profile measurement system for steel wire products
    Autorzy:
    Saurabh, -
    Ranjan, Rajiv
    Kundu, Chitresh
    Kumar, Jayendra
    Patra, Prabal
    Powiązania:
    https://bibliotekanauki.pl/articles/1396908.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    laser micrometer
    slip ring
    reflective sensor
    ARM microcontroller
    radio frequency module
    mikrometr laserowy
    pierścienie ślizgowe
    czujnik odblaskowy
    mikrokontroler ARM
    Opis:
    The quality specifications for products such as wire rods produced by the steel industry are becoming ever more demanding. This demand has led to achieve uniform product quality at high production speeds. As a result, there is a need for the systems that operate in real time and continuously measure cross-section profile of the rods and detect if any change or deviation from the desired behaviour in their cross-section. To reach this goal, a laser-based computer-controlled technology provides a useful solution. In this paper, a high speed, low cost and high accuracy non-contact laser-based measuring system has been proposed and developed using a STM32 microcontroller. The system can measure the thickness of solid, non-transparent wire rods using the linear charged-coupled sensor and sent to a microcontroller unit to further analyse and continuously display the cross-sectional profile in real time. Any deviation in the dimension over the length of the wire along with its position with respect to starting of the wire can be detected in real time. The designed and developed system has capability of measurement accuracies and respectabilities to the micrometre level.
    Źródło:
    Diagnostyka; 2019, 20, 4; 27-35
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of different optical properties for cubic titanium dioxide: an AB-INITIO approach
    Autorzy:
    Dash, Debashish
    Pandey, Chandan K.
    Chaudhury, Saurabh
    Tripathy, Susanta K.
    Powiązania:
    https://bibliotekanauki.pl/articles/102957.pdf
    Data publikacji:
    2018
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    DFT
    cubic TiO2
    refractive index
    absorption coefficient
    reflectivity
    TiO2
    współczynnik załamania światła
    współczynnik absorpcji
    współczynnik odbicia
    Opis:
    This paper presents an analysis of optical properties of cubic titanium dioxide (TiO2) using Orthogonalized Linear Combinations of Atomic Orbitals (OLCAO) basis set under the framework of Density Functional Theory (DFT). Many optical properties such as refractive index, extinction coefficient, reflectivity, absorption coefficient, photoconductivity, and loss coefficient have been studied and analyzed thoroughly. From the analysis of optical properties, it is seen that, cubic TiO2 supports interband transition between states. Reflectivity of pyrite structure TiO2 lies within IRvisible – UV region due to which it qualifies for coating industry. Furthermore, the results are compared with previous theoretical as well as with experimental results. It is found that DFT based simulation produces results which are close approximation to experimental results.
    Źródło:
    Advances in Science and Technology. Research Journal; 2018, 12, 3; 223-232
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preliminary Investigations of Structure and Properties of TIG Welded Ti-6Al-4V Alloy
    Autorzy:
    Dewangan, Saurabh
    Ranjan, Raushan
    Chattopadhyaya, Somnath
    Gope, Deepak
    Bogdan-Chudy, Marta
    Powiązania:
    https://bibliotekanauki.pl/articles/2024184.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    Ti-6Al-4V titanium alloy
    TIG welding
    microstructural analysis
    tensile test
    hardness test
    stop tytanu Ti-6Al-4V
    spawanie TIG
    analiza mikrostrukturalna
    próba rozciągania
    próba twardości
    Opis:
    The titanium (Ti) and its alloys are taken into interest for commercial purpose due to its low density, high yield strength and high corrosion resistance properties. The present work deals with microstructural observation and mechanical property analysis of tungsten inert gas (TIG) welded Ti-6Al-4V alloy joints. For the purpose, two different set of plates were welded at same current and voltage, i.e., 190 A and 24 V, by the TIG welding technique. A critical analysis of the microstructure and mechanical properties like tensile strength and hardness of the welded Ti-6Al-4V plates was carried out in this work. It was found that both plates showed different behavior during the tension test. Plate 1 had 464.54 MPa of tensile stress and it broke at the welded joint. Plate 2 was unaffected at the welded zone but was broken at the base metal zone. The second plate had tensile strength of 501.83 MPa. According to the hardness test, both the welded plates possessed the highest hardness at the welded zone. However, plate 2 showed approximately 10% higher hardness than that of plate 2. A proper inter-relationship was observed between the mechanical behavior and microstructural appearance. The microscopic view of the welded joints revealed the presence of α, β and martensitic-α phases.
    Źródło:
    Advances in Science and Technology. Research Journal; 2021, 15, 1; 156-165
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation and Analysis of Long-term Environmental Noise Levels in 7 Major Cities of India
    Autorzy:
    Garg, Naveen
    Kumar, Saurabh
    Gautam, Chitra
    Gandhi, Vishal
    Gupta, Nalin Kumar
    Powiązania:
    https://bibliotekanauki.pl/articles/31339933.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    National Ambient Noise Monitoring Network
    NANMN
    day equivalent sound level
    Lday
    night equivalent sound level
    Lnight
    Opis:
    This paper describes the long-term noise monitoring data for ten consecutive years (2011–2020) acquired from the diversified National Ambient Noise Monitoring Network (NANMN) set up across 7 major cities of India and consisting of 70 stations for continuous noise monitoring throughout the year. The annual average ambient noise levels observed throughout these ten years in 70 locations under study, including 25 locations in commercial zones, 12 in industrial, 16 in residential, and 17 in silence zones, are described. The noise scenario in these ten years is compared and analyzed. It is observed that no site in residential or silence zones meets the ambient noise limits for the past ten years. The study suggests guidelines for a policy framework for environmental noise management and control to regulate noise pollution in Indian cities.
    Źródło:
    Archives of Acoustics; 2023, 48, 1; 103-126
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A newly developed assessment tool on collaborative role of doctor–pharmacist in patient medication management
    Autorzy:
    Porwal, Mayur
    Singh, Lokpal
    Kumar, Arvind
    Rastogi, Vaibhav
    Maheshwari, Kamal
    Sharma, Saurabh
    Powiązania:
    https://bibliotekanauki.pl/articles/552537.pdf
    Data publikacji:
    2016
    Wydawca:
    Stowarzyszenie Przyjaciół Medycyny Rodzinnej i Lekarzy Rodzinnych
    Tematy:
    questionnaire
    pharmacist
    doctor
    communication
    Źródło:
    Family Medicine & Primary Care Review; 2016, 1; 44-48
    1734-3402
    Pojawia się w:
    Family Medicine & Primary Care Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Parotid pilomatrixoma: Diagnostic trap and management dilemma
    Autorzy:
    Bhardwaj, Abhishek
    Angral, Sumeet
    Chandra, Sharath
    Malhotra, Manu
    Priya, Madhu
    Varshney, Saurabh
    Singh, Arpana
    Raj, Ritu
    Powiązania:
    https://bibliotekanauki.pl/articles/454890.pdf
    Data publikacji:
    2020-03-30
    Wydawca:
    Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
    Tematy:
    parotid gland
    parotid neoplasms
    pilomatrixoma
    Opis:
    Introduction. Pilomatrixoma is a benign cutaneous adnexal neoplasm originating from the matrix cells of the hair follicles. Usually a slow growing and painless lesion, it must be considered in differential diagnosis of a preauricular swelling. Rapidly progressive lesion with skin fixity and missed subtle cytological features may lead to a misdiagnosis of parotid neoplasm resulting in management dilemma. Aim. This report emphasizes consideration of pilomatrixoma as a differential diagnosis in a similar clinical scenario, the role of frozen section during surgery and fascia lata interposition to prevent Frey’s syndrome. A brief review of literature is presented. Description of the case. We present a similar dilemmatic case of a 19 years old male with preauricular swelling. Based on cytology and image findings, a diagnosis of parotid neoplasm with possible malignancy was made. Surgical exploration revealed primarily a subcutaneous lesion with partial attachment to superficial surface of parotid. Lesion was excised with a cuff of normal parotid tissue. Frozen section confirmed it to be a nonmalignant lesion with possibility of pilomatrixoma. Fascia lata was interposed between parotid and thin skin flap to avoid gustatory sweating. Patient is on follow up for 6 months without recurrence or any complication. Conclusion. Pilomatrixomas can be misdiagnosed in case of lesions in subcutaneous plane in parotid region. In such cases, the differential diagnosis should include tumor and non-tumor lesions of skin and parotid gland. Importance of frozen section should also be kept in mind and the pathologist should be engaged at the time of surgical excision of the tumor. Interposition of soft tissue between parotid and thin skin flap helps prevent gustatory sweating in such cases. A high index of suspicion is needed for proper diagnosis and management of these lesions.
    Źródło:
    European Journal of Clinical and Experimental Medicine; 2020, 1; 54-58
    2544-2406
    2544-1361
    Pojawia się w:
    European Journal of Clinical and Experimental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Atypical extra nasopharyngeal angiofibroma in an unusual location: tonsil posterior pillar (oropharynx)
    Autorzy:
    Mittal, Shweta
    Priya, Madhu
    Varshney, Saurabh
    Angral, Sumeet
    Xavier, Joyson
    Malhotra, Manu
    Bhardwaj, Abhishek
    Kumar, Amit
    Tyagi, Amit Kumar
    Powiązania:
    https://bibliotekanauki.pl/articles/454967.pdf
    Data publikacji:
    2020-03-30
    Wydawca:
    Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
    Tematy:
    atypical angiofibroma
    extra nasopharyngeal (ENA) oropharynx
    Opis:
    Introduction. Angiofibroma is a benign, locally aggressive highly vascular tumor that typically affects young adolescent males and has a pathognomonic epicenter of origin in the nasopharynx. The atypical angiofibromas share the same histological features as that of Juvenile nasopharyngeal angiofibroma, however they differ significantly in their clinical features. Aim. Here we are reporting a very rare case of atypical angiofibroma in an adult male presenting as a non-vascular mass in the oropharynx with posterior pillar as the subsite. Description of the case. A 26-years old male patient presented with chief complaints of foreign body sensation and mass in throat for one and a half months which was gradually progressive in size. Histopathological examination revealed a lesion with an intricate mixture of blood vessels, irregular fibrous stroma with loose edematous and fibrous area along with multinucleated stromal cells which was suggestive of angiofibroma. Conclusion. Oropharyngeal angiofibroma, being an atypical angiofibroma in terms of site and presenting complaints, presents a diagnostic challenge. Though rare, it should always be kept as a differential diagnosis in any oropharyngeal mass irrespective of its vascularity, typical age or sex of the patient.
    Źródło:
    European Journal of Clinical and Experimental Medicine; 2020, 1; 49-53
    2544-2406
    2544-1361
    Pojawia się w:
    European Journal of Clinical and Experimental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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